#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
size_t my_strlen(const char* str)
{
	assert(str);
	int cnt = 0;
	while (*str!='\0')
	{
		cnt++;
		str++;
	}
	return cnt;
}
int main()
{
	size_t sz = my_strlen("abc");
	printf("%u\n", my_strlen("abc"));
	return 0;
}
